Pseudo-nitzschia-lator software (now called dmfTable): Software to help identify different species of Pseudo-nitzschia, based on SEM morphometrics, by J.M. Ehrman and I. Kaczmarska; Digital Microscopy Facility, Mount Allison University, Sackville, NB. pdf file of the paper, in the L&O Bulletin (2.7 MB). Note: the software is being updated to include several additional Pseudo-nitzschia species, and will be released later

Marine Plankton Diatoms of the West Coast of North America: by E.E. Cupp (1943); a pdf file (8 MB) of Cupp's original paper: Marine Plankton Diatoms of the West Coast of North America. Berkeley, California; University of California Press, 1943, Bulletin of the Scripps Institution of Oceanography, volume 5, number 1. Contribution from the Scripps Institution of Oceanography, New Series, number 190. It shows some of the original drawings of species that were then called Nitzschia (starting on p. 202). The genus name has since changed to Pseudo-nitzschia; some species names have also changed.

ALGADEC: Detection of toxic algae with a semi-automated nucleic acid biosensor; also see link in Coastal Portal

The Fritsch Collection of Freshwater Algae and Illustrations. The Collection contains floristic information from a wide range of papers published worldwide, from the end of the eighteenth century to the present day. The information, which now exceeds 100,000 foolscap sheets and several million illustrations, together with its own reprint collection, is currently accessed by email, phone, letter or personal visit.

* The 3I interactive key to species and databases of Harmful Algae: An online interactive key to harmful algal species, and to serve as a taxonomic database platform to assist species identification. The platform utilizes 3I for the development of the interactive key and taxonomic database. Keys to species for important HAB species are on-going